30 December 2005 Laser feedback interference in gain-coupled DFB lasers
Author Affiliations +
Proceedings Volume 6028, ICO20: Lasers and Laser Technologies; 60282H (2005); doi: 10.1117/12.667350
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China
Abstract
The laser feedback interference in gain-coupled DFB laser diodes (Distribute Feedback LD) is analyzed. The threshold gain and frequency variation in the DFB laser diode are theoretically deduced. Considering the experiment in practice, we analyze the laser feedback interference at the condition of multiple external cavities. Some parameters have influences on the feedback interference, e.g., the coupling coefficient, the linewidth enhancement factor of gain-coupled DFB laser, the reflection coefficient of external reflector. We discussed these different parameters value in numerical analysis, including the simulation at the condition of multiple external cavities. Compared with the effect of laser feedback interference on F-P and λ/4 phase-shifted DFB lasers, the gain-couple DFB lasers are more sensitive to optical feedback for a specific κL value (coupling coefficient and L cavity length). These results show that the gain-couple DFB lasers can be used as laser feedback sensors with a high accuracy.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ming Wang, Junping Zhou, "Laser feedback interference in gain-coupled DFB lasers", Proc. SPIE 6028, ICO20: Lasers and Laser Technologies, 60282H (30 December 2005); doi: 10.1117/12.667350; https://doi.org/10.1117/12.667350
PROCEEDINGS
10 PAGES


SHARE
KEYWORDS
Numerical analysis

Semiconductor lasers

Feedback signals

Reflectivity

Reflectors

Chromium

Laser applications

Back to Top